UNDERNUTRITION OF THE MERINO SHEEP AND ITS SEQUELAE .5. THE INFLUENCE OF SEVERE GROWTH RESTRICTION DURING EARLY POSTNATAL LIFE ON REPRODUCTION AND GROWTH IN LATER LIFE
UNDERNUTRITION OF THE MERINO SHEEP AND ITS SEQUELAE .5. THE INFLUENCE OF SEVERE GROWTH RESTRICTION DURING EARLY POSTNATAL LIFE ON REPRODUCTION AND GROWTH IN LATER LIFE
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DOI：
10.1071/ar9790939
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发表时间：
1979-01-01
影响因子：
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通讯作者：
ALLDEN, WG
中科院分区：
文献类型：
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作者：
ALLDEN, WG
两组美利奴羔羊在出生早期不同阶段的生长受到严重限制：420日龄时体重为12 kg。当1年后出生的正常发育的兄弟姐妹在53天时达到相似的体重时，所有组合并并转移到播种牧场，在那里它们一起放牧6.5年。在此期间，比较了实验动物的母羊繁殖、生长和羊毛产量。早期营养剥夺不影响母羊的繁殖性能，也不影响母羊后代的出生重和断奶重。限制性羔羊在恢复期的前2年恢复正常生长，但其生长潜力不能持续，早期施加的严格生长限制导致其后续的成年羔羊体型较小。早期生长限制显著降低了每只羊的羊毛产量和羊毛纤维数量。
The growth of 2 groups of Merino lambs was severely restricted at different stages of early postnatal life: at 420 days of age they weighed 12 kg. When their normally grown sibs born 1 yr later attained a similar weight at 53 days all groups were combined and moved to sown pastures where they grazed together for 6.5 yr. During this period the ewe reproduction, growth and wool production of the experimental animals were compared. Nutritional deprivation in early life did not affect the reproduction performance of the ewes or the birth weights and weaning weights of their progeny. The restricted lambs resumed normal growth for the first 2 yr of the recovery period, but their growth potential was not sustained and the severe growth restrictions imposed in early life had as its sequel a smaller adult. Wool production and the number of wool fibers per sheep were significantly reduced by growth restrictions in early life.